Centrifugal pump



' Jan. 8, 1924.I 1,480,441

F. P. HARMON GENTRIFUGAL PUMP Jan. 8, 1924. 1,480,441

F. P. HARMON CENTR IFUGAL PUMP Filed Jan. 6, 1922 2 Sheets-Sheet 2 31a/vanto@ Patented Jan. 8, 1924.

UNITED s'rATEsPATENT OFFICE.

FRANK P. HARMON, OF LISBON, TEXAS, ASSIGNOB OF ONE-FOURT T THOMAS S. PITCOCK, 0F DALLAS, TEXAS.

CENTRIFUGAL PUMP.

Application med January 6, 1922. Serial No. 527,434.

To all whom z't may concern.'

Be it known that I, FRANK P. HARMON,

a citizen of the United States, residing at Lisbon, in the county of Dallas and State of Texas, have invented 'certain new and useful Improvements in CentrifugallPumps, of which thefollowing is a specification.

This invention relates to new and useful improvements in centrifugal pumps.

The invention has to do with that class of pumps in which liquid is elevated and discharged by centrifugal action and radial displacement of the liquid when the pump is operated. A particular object of the invention is to provide a pump head and chamber'of such a nature that the pump is at all times ready for operation and does not require priming. Another object of the invention is to provide Vmeans for retaining a portion of the fluid in the radial passages of' the head so that when said head is rotated the liquid will be displaced outwardly and start the pumping operation.

Among other novel features, arey a stuffing box connection between the pump shaft and the pipe thru which the liquid is elevated; the provision of a novel form of bearing box and lubricating structureV for the pinion which rotates the shaft; a simple .3 and practical head structure, which includes a novel form of liquid retaining'means at the outer ends of the ports anda compactand simple form` of pump chamber construction, together with a substantial frame and support for the various parts.

A construction designed to carry out the invention will be hereinafter described together with other features of the-invention. The invention will be more readily understood from a reading of theifollowing specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein r Fig.`` 1 is a vertical sectional view of a pmp apparatus constructed in accordance with my invention, Fig. 2 is an-elevation of the same .on a reduced scale,

Fig. 3 is anenlarged cross section on the 5 HMH of ri 2, Y

Fig. 4 is a plan view ofthe head, a portion being illustrated in section, 1

Fig. 5 is a detail of the head, partially in elevation and partially in crosssection,

Fig. 6 is a detail of one of the retaining@s plug structures,

Fig. 7 is a detail of one ofthe keepers,

Fig. 8 is a detail of the lower end of the pump pipe showing the foot valve, and

Fig. 9 is a detail of a modified form ofl head structure, being illustrated\partiallyl in elevation and partially in cross section.

'In the drawings thenumeral 10 designates a suitable base on which suitable-upright corner posts 11, are mounted. These posts are preferablyl formed of angle iron, but may be otherwise shaped. The post may be secured to; the 'base by angular brackets 12. A transverse plate 13 'is mounted on the upper ends of the corner posts and is preferably circular. A metallic band 14 surrounds the corner posts immediately under said plate,^there being four posts the band is square in plan. The plate 13 is suitably held in position.

A circular housing l5 is provided at its lower edge with an outwardly directed an nular flange 16, which rests upon the late 13 and is secured thereto by bolts 17. uitable provision is made for establishing a water-tight joint between the flange and the plate.A Within the housing a pump chamber is formed. In one side of the to of the housing is a ypriming plug 18 which may be removed to introduce a liquid when des sired. In the other side of the top of the` `housing an outlet pipe 19 is connected. At lthe center o'f the top of the housing is a'.

dome 20 in which a bushing 21 is disposed. The bushingreceives a reduced trunnion 22v of a circular head 23.

A hollow shaft 24 passes thru the plate 13 and is screwed into a boss 25 projecting from the center of the lower Yside ofthe head, as is best shown in Fig. 5. The boss rests upon the plate 13 and on the underside of said plate a stuiiing box 26 of a suitable nature is provided so that the liquid cannot esca from the pump chamber. The hollow or tubular shaft'24 extends down` wardly and passes thru a stalling, box- 27 .which is suspended-in a cross plate 28.y 'The stuing box is provided with ballvbearin s\ 29 to receive an annular collar 24 which 1s immediate? bonweb@ hub of a pinion 1 30",mounte on thel shaft. A packing gland around the hub of said pinion. The closure ring may be raisedand oil introduced into the box so that the ball bearings will be immersed in the same and this oil will be retained by the packing gland.

A second erom plate 33v is arranged bclow the first"oross plate and supports a stuiing box casting 34 which has a screw threaded boss 35 depending thru said cross plate. The pipe 36 in which the liquid is elevated is screwed in the said boss. A packing gland37 is provided at the upper end of the casting and surrounds the lower end of the shaft 24 which terminates immedi .ately above the pipe 36. By this arrange- ,formed by the posts 1l. .The cross plates rest upon these bands and are fastened by bolts 39, which engage keepers 40 contacting with the under edges of the bands on each side of diagonal. corner posts as-is best shown in Figs. l and 3.

For revolving the shaft 24, I mount a counter shaft 41 in brackets 42 supported on 4the plate 28. A pulley 43 is mounted on the shaft between the brackets and is suitably driven. A beveled gear 44 is fastened on the end of the shaft -41 and meshes with the pinion 30, whereby the latter is driven.

It is to be understood that motion could be applied to the shaft 24 in any suitable manner.

One of the particular features of the invention is the construction .of the head 23. At the center of the head a chamber 45 is formed and from this chamber ports or passages 46 radiate and extend laterally' to the periphery of said head. In order that all of the liquid may not be displaced from said passages when the headceases to rotate, plugs 47 are driven into the ends of the passages so as `to be Hush with the periphery of the head. v Each plug is eccetrically counter bored at its upper'side so as t provide a port 48 smaller in diameter, than the diameter of the passage. From this it will be seen that the level of the liquid in the passage, when the head is stopped, will be vsubstantially alined 'with the Vbottom of the ports 48, and thus when rotation is again imparted to the he-ad, the liquid remaining in the passag'Y will be displaced outwardly and the pumping action started, thereby making itunnecessary to again prime' the It is pointed out that by revolving the head in a comparatively high rate of speed alarge quantity of liquid will be displaced thru the passages 46, thus causing a considerable volume to be elevated thru the pipe 3G and the shaft 24. At the bottom of the ,pipe36-I mount a cap A49 in which an nadam in stages as is shown at 23 in Fig. 9. In

this modification the head is provided with the radial passages 46 like those of the head 23, and above these passages is arranged a second set of passages 46a which may be in lstaggered relation to the passages 46. It is obvious that several stages of passages may be employed and the capacity of the pump greatly increased. It is also pointed out that the device will operate in an easy manner and may be adjusted so that the load is carried by the bearings 29, which owing to the short length of theshaft 24 and the rapid rotation of the head, will be reduced to a minimum.

The invention is vpresented as including all such modifications as come within the scope of the appended claims and various changes and alterations may be made without departing from the spirit of the invention.

What I claim, is:

l. In a centrifugal pump, the combination of an upright supporting frame, a plate mounted on the upper end of the frame, a stuffing box carried by the plate, a pump housing mounted on the plate having an outlet, a tubular shaft passing through the stuiling box into the housing, a circular head mounted on the shaft within the housing and having-a plurality of radial passages connecting with the tubular shaft, plugs in the outer ends of said passages having elevated discharge openings, whereby a level of fluid is maintained-in said passages for priming said head, a transverse support in the frame, means connected with said tubular shaft and mounted on said support for rotating said tu'bular shaft, and a stationary tubular shaft coupled to the lower y lill vated discharge openings, whereby a level port, a second stuiiing box mounted on the of fluid is maintained in said passages for last named support and receiving the lower 10 priming said head, a transverse support in end of the tubular rotary shaft, and a stathe frame, and a gear mounted fast upon tionary tubular shaft connected With the last 5 the tubular shaft, a lubricating bearing named stuffing box.-

member carried by said support and support- In testimony whereof I aiiix my signature, ing said gear, a driving gear engaging the l first named gear, a second transverse sup- FRANK P. HARMON. 

